The surface of the slide way base plate is provided with a plurality of slide ways arranged on the lower surface of the tray clamp.

一托盘夹具，其设于该滑道基板的另一表面，用以夹固该托盘；

youdao

Now, about that little bulge at the base of the screen... just run your fingers beneath it to liberate a built-in, lighted disc tray "without so much as a whisper" ready for DVD or CD playback -- DivX, MP3, JPEG and Video CDs all supported.

ENGADGET: B&O BeoVision 7-40 reviewed